Men Know More About THIS Than Their Penises

One of the most common jokes about men is that many of them are clueless when it comes to understanding female anatomy. But, according to the results of a new U.K. study, many of them are totally ignorant about their own.

In fact, nine out of 10 men surveyed by Lloyds Pharmacy Online Doctor service said they could locate their car's oil dipstick, but only half of them could name and identify their own sex organs.

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The survey asked 1,500 men to locate key parts of their anatomy and gave them questions relating to male sexual health. One in 12 guys thought some of their sexy parts were in their ears, while only six percent could name the common causes for erectile dysfunction.

Considering how much guys touch—and talk about—their members, we were a bit surprised to hear that they don't really know all that much about them. Though, if we were given an unmarked diagram of the female sexual anatomy, we can't say with 100 percent certainty that we'd be able to correctly label each and every part. (It has been quite a while since sex ed class, after all.)